Innovative Solid Bowl Decanter Technology

2

Solid bowl centrifuge technology

Modern centrifuges are used

in technical processes for

the mechanical separation of

mixtures of solids and liquids.

Sedimentation, centrifugation,

and filtration are mechanical

separation processes, in con-

trast to distillation, incineration

and thermal drying, which are

thermal separation processes.

In many processes, mechani-

cal separation is primarily

responsible for product quality,

production efficiency and envi-

ronmental control. Mechanical

separation processes are

found in practically all indus-

trial sectors, including food,

chemical, pharmaceutical,

biotech, mineral, and environ-

mental.

Modern centrifuges have many

advantages in comparison to

other separation processes

such as filtration and sedi-

mentation. Compact designs,

sealed construction to control

odor emissions and avoid con-

tamination of the product, ease

of operation with continuous or

automatic control systems,

and limited replaceable operat-

ing parts such as filter media

or filter aids make centrifuges

advantageous to use.

Advantages of modern centrifuges

3

Applications

The following basic process

operations are possible with

solid bowl decanter centrifuges:

• Clarification of liquids

• Dewatering of sludges and

suspensions

• Thickening of slurries

• Separation of three-phase mix-

tures, i.e. two immiscible liquid

phases and a solid phase

• Classification of solids in a

suspension according to par-

ticle size (wet classification)

• Sorting of solids by density.

To obtain optimum results,

solid bowl decanter centrifuges

must be custom designed to

suit specific sep aration pro-

cesses.

FLOTTWEG CENTRIFUGES

can more effectively help one

reach their processing goals by

offering a variety of basic de-

signs, such as the DECANTER,

TRICANTER®, SEDICANTER®

and SORTICANTER®. Solid

bowl centrifuges are used

in most areas of mechanical

liquid-solid separation.

® = registered trademark in various countries

4

Typical processes

Vegetable / animal

raw materials

Algea

Animal fat

Beer

Blood

Brewer’s yeast

Biodiesel

Biogas

Casein

Cellulose derivatives

Coffee

Drinking water

Fermentation products

Fish meal

Fish oil

Fish water

Fruit juice

Gelatin

Fleshings

Lactose

Lignine

Meat

Molasses

Pektin

Potato

Protein

Sorbose

Soy protein

Starch

Stillage

Surimi

Vegetable extracts

Vegetable juice

Vegetable oils

Vitamins

Wine

Chemical / pharmazeutical

products

Aluminium hydroxide

Barium sulfate

Calcium fluoride

Calcium sulfate

Caustic soda

Color pigments

Cryolite

Epoxy resin

Fluorescents

Iron oxide

Lead oxide

Lead sulfate

Latex

Nickel hydroxide

Plastics derivatives/additives

Phosphate compounds

Phosphoric acid

Polyethylene (HDPE)

Polypropylene

Polystyrene

PVC

Salts

Silicate

Sodium chloride

Titanium dioxide

Tricalcium phosphate

Zinc carbonate

Zinc oxide

Zinc sulfate

Minerals

Bauxite

Bentonite

Calciumcarbonate

Carbide sludge

Clay kaolin

Copper extraction

Graphite

Gypsum

Iron hydroxide

Kaolin

Magnesium hydroxide

Mica

Silica

Silicium

Silicon carbide

Environmental

protection / Recycling

Industrial wastewater

Municipal wastewater

Manure

Paint sludge

Plastics sorting/recycling

Steelworks sludge

Mineraloils

Coal tar

Drilling mud

Mineral oil

Oil sludge

Examples from more than 300 different applications

® = registered trademark in various countries

5

Solid bowl centrifuges

The basic principle of the

solid bowl centrifuge has

been known since the end

of the 19th century. Over the

course of time, technology

improvements along with the

availability of high strength

and corrosion resistant raw

materials have allowed solid

bowl decanters to be appli-

cable to many processes. The

utilization of electronic and

electromechanical measur-

ing and control components

has improved the perfor-

mance and availability of the

machines. The basic design

of a solid bowl centrifuge is

relatively simple and can be

customized by FLOTTWEG for

different requirements. Of all

modern industrial centrifuges,

solid bowl centrifuges have the

broadest range of application.

6

FLOTTWEG DECANTER CENTRIFUGES

Feed

The slurry is fed through a sta-

tionary pipe into the feed zone

located in the center of the

scroll. The product is then

accelerated circumferentially

and delivered through distribu-

tion ports into the bowl.

Bowl

The bowl has a cylindrical/

conical shape and rotates at

a pre-set speed optimal for the

application. The slurry rotates

with the bowl at the operating

speed and forms a concentric

layer at the bowl wall. The sol-

ids contained in the slurry are

deposited against the bowl

wall by centrifugal force. The

length of the cylindrical bowl

section and the cone angle are

selected to meet the specific

requirements of an application.

Scroll

The scroll rotates at a slightly

different speed than the bowl

and conveys the deposited sol-

ids toward the conical end of

the bowl. This differential

speed determines the resi-

dence time of the solids in the

bowl. Residence time is an

important variable for the dry

solids content. It can be adjust-

ed by changing the differential

speed of the scroll thus provid-

ing optimal separation.

If the physical properties of the

slurry change, FLOTTWEG

DECANTERs can be supplied

with a different scroll design or

by modifying an existing scroll.

Scroll pitch and single or mul-

tiple flight configurations are

important design variables.

FLOTTWEG DECANTER for the liquid-solid separationwith gravity overflow of the liquid phase (centrate)

Eccentric – adjustable weir plates (patented)

solids discharge liquid discharge by gravity

feed inlet

7

Solids discharge

Settled solids are ejected

through ports at the conical

end of the bowl into the solids

housing and fall through to the

discharge chute.

Materials of construction

FLOTTWEG uses high-quality

stainless steel for all wetted

areas. Bowl and scroll castings

are made from centrifugal cast

high strength and corrosion

resistant stainless steel.

Rotor bearing

A special selection and

arrangement of bearings pro-

vides long life and exceptional

reliability. A central lubrication

system supplies either grease

or oil to bearings.

Overflow weirs

The clarified liquids flow to the

cylindrical end of the bowl

where they exit over weir

plates. Easily adjustable preci-

sion weir plates allow for the

precise adjustment of the pond

depth in the bowl. Overflow is

then collected in a centrate

chamber and discharged by

gravity.

Impeller (skimmer)

The clarified liquid can also be

decanted with an impeller and

discharged from the bowl

under pressure. This eliminates

the need for a separate cen-

trate pump. The FLOTTWEG

adjustable impeller is an engi-

liquid dischargeunder pressure

feed inlet

solids discharge

FLOTTWEG DECANTER with pressurized centrate discharge

Adjustable impeller

neering refinement that permits

quick and precise adjustment

of the pond depth during

operation to accommodate

changing conditions.

8

FLOTTWEG TRICANTER®

3-phase separation

The FLOTTWEG TRICANTER®

enables three-phase separa-

tion, i.e. the simultaneous

separation of two immiscible

liquids with different densities

and one solid phase, provided

that the solid phase is the

heaviest phase. The most

important difference from

a decanter is the separate

discharge of the two liquid

phases.

The FLOTTWEG TRICANTER®

discharges the heavy liquid

through an adjustable impeller

under pressure and the light

phase by gravity. The adjust-

able impeller allows adjusting

the separation zone and

degree of separation within the

machine during operation. This

optimizes purity of the liquids

and may possibly eliminate

downstream equipment.

FLOTTWEG TRICANTER® (THREE PHASE DECANTER)Discharge of the centrate: heavy liquid phase under pressure, light phase by gravity

heavy liquid phasedischarge under pressure

feed inlet

light liquid phase discharge by gravitysolids discharge

Adjustable impeller

9

FLOTTWEG SORTICANTER®

The innovative FLOTTWEG

SORTICANTER® is designed

for the separation of solids

by density. The process is

aided by a carrier liquid with a

specific gravity that is between

the densities of the two solid

streams to be separated.

The patented FLOTTWEG

SORTICANTER® consists of a

cylindrical conical bowl with a

second inner cone at the cylin-

drical end and a double acting

scroll conforming to the inner

contour of the bowl.

The bowl and lagging scroll

rotate at a high speed in the

same direction. The solid-liquid

mixture is conveyed through

the centrifuge feed pipe and

inlet ports in the scroll body

into the bowl and accelerated

to the bowl speed. Centrifugal

force causes the solids which

are heavier than the carrier

liquid to settle against the

bowl wall. The scroll conveys

the deposited layer of heavy

solids toward the conical bowl

section, over the drying zone

and ejects them through ports

into the stationary solids hous-

ing and down the discharge

chute.

The solids which are lighter

than the carrier liquid float and

are conveyed with the liquid

toward the cylindrical end of the

bowl. When the floating par-

FLOTTWEG SORTICANTER® for plastic recycling

liquid dischargeunder pressure

feed inlet

solids discharge light phasesolids discharge heavy phase

ticles have reached the second

inner cone, scroll flights wound

in the opposite direction to

those conveying sedimentated

solids transfer the lighter solids

across a drying zone to the exit

ports. The liquid is skimmed off

and discharged under pressure

by an impeller at the cylindrical

end of the bowl.

After an intermediate cleaning

step, liquid may be recycled

as carrier liquid. Carrier liquids

with different densities enable

the user to shift the effective

interface zone.

® = registered trademark in various countries

10

• Gastight machine design

• Clean-in-place provisions

available to meet pharma-

ceutical industry standards

• Fluoropolymer rotor seals

available for critical applica-

tions

FLOTTWEG SEDICANTER®

The FLOTTWEG SEDICANTER®

is used for the separation of

solids from liquids when the

solids form a soft but flowable

sediment.

The SEDICANTER® is used in

cases where the solids are too

fine-grained to be processed

in a normal decanter and the

sediment cannot be easily

discharged from the decanter

due to its soft consistency.

During the separation process,

the liquid and solids move in

the same direction without

having to pass through a

turbulent inlet zone. The cen-

trate is discharged through an

adjustable impeller within the

scroll. The sediment formed in

the SEDICANTER®, the heavy

phase, is accumulated and

pressed out of the bowl under

an immersion disc.

Applications for the

SEDICANTER® include

“soft products” such as

biomasses, yeast suspensions,

protein suspensions and

fermentation broths.

Technical features:

• Up to 10,000 x g centrifugal

force possible to facilitate the

separation of very fine, slow-

settling solids

• Uniquely designed feed

distributor and bowl seal to

prevent foaming in the prod-

uct inlet zone

FLOTTWEG SEDICANTER®

FLOTTWEG SEDICANTER® S4E-3

• Optional drives including the

FLOTTWEG SIMP-DRIVE®.

11

Centrifuge cleaning

Characteristic features of

centrifuges to meet hygienic

requirements are:

• All welds are ground to

meet specific sanitary finish

standards.

• All product-contact parts are

provided with a surface finish

in accordance with specified

roughness values.

• Rinsing nozzles are provided

for the centrifuge housing

and for the interior of the

scroll body.

• The centrate impeller is

adjustable to facilitate flush-

ing of the bowl.

• Frequency-controlled drives

for CIP-cleaning at low speed.

• Electropolished scroll, hous-

ing and bowl surfaces.

• Special hygienic housing

seals

• Electrically reversible scroll

rotation for enhancing clean-

ing during CIP cleaning.

Centrifuges must always

be flushed clean before

shutdown. Depending on the

application, different cleaning

systems may be incorporated

into the centrifuge design.

FLOTTWEG CENTRIFUGES

are designed for continuous

operation and do not need

to be opened for cleaning.

FLOTTWEG CENTRIFUGES

for pharmaceutical, biotech-

nological and food processing

applications are designed with

Clean-in-Place (CiP) systems.

Cleaning of Centrifuges for

Standard Applications

For the majority of applications

(e.g. sludges, separation of

crystalline products), it is suf-

ficient to flush the centrifuge

before shutdown through the

feed pipe to remove deposits

of solids. The flushing time and

the type of cleaning fluid are

product-dependent. In most

cases, the use of a solids-free

centrate will be adequate.

Additional rinsing nozzles for

cleaning the housing, the bowl

exterior and the scroll interior

can be installed if required.

Cleaning of Centrifuges for

Pharmaceutical, Biotechnical

and Food Processing

Applications

FLOTTWEG designs its centri-

fuges for the pharmaceutical,

biotechnological and food

processing industries to meet the

highest demands for cleanliness.

Requirements and specifications

for design, manufacturing

and testing are according to

specific company standards.

® = registered trademark in various countries

12

Drives

General

Decanter centrifuges are

subject to two conflicting basic

drive requirements. On one

hand, the entire rotor has to

run at high speed, and on the

other hand, the scroll inside

the bowl has to rotate at a

very low differential speed and

simultaneously at a high torque

relative to the bowl wall.

FLOTTWEG frequency

controlled electric motors or

speed-adjustable hydraulic

motors offer infinitely variable

speed. Long start-up times

help overcome a high inertia

moment and avoid peak loads

during the initial current phase.

FLOTTWEG offers hydraulic

motors or gear drives to drive

the scroll depending on the

application. The majority of the

drive configurations offer vari-

able differential speeds. This

ensures optimum adjustment

to meet individual customer

requirements.

Fully hydraulic drive Hybrid drive Frequency inverter drive (VFD)

Fully hydraulic drive

The bowl and the scroll are

driven by separate hydraulic

motors. A compact hydraulic

aggregate with two variable

pumps feeds two separate oil

circuits. The volume flow of the

oil determines the bowl speed

and the differential speed of

the scroll, whereas the oil sup-

ply pressure is directly propor-

tional to the torque output and

thus to the load. This drive per-

mits the use of variably adjust-

able control, monitoring and

analog control. The drive’s

design enables independent

rotation of the scroll even when

the bowl is shut down.

Hybrid drive

In this version, a frequency-

controlled electric motor drives

the bowl instead of a hydraulic

motor. The hydraulic aggregate

for the scroll is compact

because only one oil circuit is

required. Control and adjust-

ment are the same as with the

hydraulic drive. Hydraulic

drives offer particular advan-

tages for applications in mobile

processing systems. Their

compact design (controls,

aggregate) provides for optimal

utilization of floor space.

Another advantage is applica-

bility in explosion proof areas.

13

Backdrive with Dual-VFD SIMP-DRIVE®

Gear drive with frequency

inverter

A frequency-controlled electric

motor drives the bowl via a

V-belt drive. A second parallel

V-belt drive with a slightly dif-

ferent transmission ratio pow-

ers a cycloid planetary gear

and generates the differential

speed of the scroll. The differ-

ential speed can be changed

and adjusted by changing

V-belt pulleys.

The FLOTTWEG gear drive is the

most basic drive solution and is

particularly suited for separation

processes which do not require

operating adjustment of the dif-

ferential speed.

Backdrive with Dual-VFD

This solution is derived from

the FLOTTWEG gear drive with

the scroll drive having its own

frequency-controlled motor.

The differential speed can be

separately adjusted with a pre-

set range and controlled and

monitored independently of

torque. Both drive motors are

powered by a FLOTTWEG fre-

quency inverter, which is pow-

er-linked via a regenerative

circuit. This drive is best suited

for high differential speeds.

SIMP-DRIVE®

The FLOTTWEG SIMP-DRIVE®

controls the differential speed

in relation to the scroll torque.

Therefore the decanter adapts

itself to varying load conditions

and dewaters the product in

order to reach maximum cake

dryness. The main feature of

this new concept is a multi-

stage planetary gear which

allows for entirely independent

operation and drive of the bowl

and scroll (similar to

a hydraulic drive)

Benefits include:

• High efficiency and low energy

demand

• A simple drive system not

requiring linkage

• Independent frequency

inverters (VFDs) which are stan-

dard designs, simple

to operate and simple to

maintain

• Constant torque, high solids

• Simple integration into pro-

cess control systems

• Smallest possible inverter

size

• High flexibility in the selection

of the operating speed

• Discharge of the bowl even

at full stop

• Applicable for small to

medium differential speeds

• Low power draw.

® = registered trademark in various countries

Bowl drive

Scroll drive

14

Centrifuge controls

Fluctuations of the solid

throughput and concentration

in the centrifuge may cause a

decrease in separation results,

blockage or an overload of the

centrifuge. To avoid problems

and to fully utilize the capacity

of the centrifuge, the differen-

tial speed needs to be contin-

uously adjusted for operating

conditions.

FLOTTWEG offers control sys-

tems for the differential speed

which are based on the follow-

ing principle. Scroll torque is a

measure of bowl solids load.

Load and torque should be

kept at an optimum value.

If the torque exceeds the opti-

mum value, the FLOTTWEG

control system increases the

differential speed to convey

the solid faster out of the bowl

until the torque decreases.

Conversely, the differential

speed is reduced when the

torque decreases. This auto-

matic control process ensures

optimum separation during

normal operation.

An integrated two-stage over-

load protection offers excellent

control of the machine result-

ing from process deviations.

If the increase in differential

speed is not sufficient to com-

pensate for a solids overload,

the feed supply is stopped until

the torque falls back below set

point. In the majority of situa-

tions, this is sufficient to reme-

dy the overload without having

to shutdown the system. If this

measure is insufficient to keep

the scroll torque from rising,

the bowl drive is shut down

when the torque reaches the

second set point.

As the bowl speed decreases,

the torque is reduced and the

machine will usually empty

itself. Typically there is no need

for manually removing the

solids. Machines with hydraulic

drive or SIMP-DRIVE® enable

solids discharge at full-torque

scroll operation during the

bowl shut down.

Process control system

® = registered trademark in various countries

15

FLOTTWEG Automation Technology

Optimal Integration and

operation - customized to

your process

Your advantages

• Optimal integration of the

centrifuge’s control panel

into your control system is a

necessity for high efficiency

and safe operation of your

plant

• Easy and self-explanatory

operation of the FLOTTWEG

touch control minimizes down

time due to operating errors.

• Systems are equipped with

connections that allow for all

options of remote mainte-

nance/control. This avoids

unplanned down time and

minimizes operating costs.

FLOTTWEG AG assures an

optimal tuning/adaptation of

the control panel for the use

with the centrifuge, because

only a manufacturer of a

machine has the complete

knowledge of all technical

details, thus avoiding inter-

faces with undefined respon-

sibilities. After a time-efficient

start-up the centrifuge gets

perfectly integrated into your

process and the full capacity

of production can be reached

without delay. As a manufac-

turer of our control panels, we

can fulfill nearly all customer-

specific requirements. Adapta-

tions to new requirements

can be achieved easily. The

extensive testing of our control

systems before delivery in our

FLOTTWEG Touch Control

facility avoids delays at start-

up and enables the customer

to get the production up to

speed quickly and efficiently.

With the help of our know-how

and the competence as a

manufacturer of centrifuges,

you can be certain that all of

your future challenges can be

solved easily.

• All functionalities and signals

are tested before delivery

which facilitates the start-up

process and gets your pro-

duction up to speed quickly.

• Highest possible safety is

accomplished via compli-

ance with all relevant ISO

and EN regulations as well as

our comprehensive Factory

Acceptance Test.

• Fast and world-wide

availability of spare parts is

obtained by using standard

components

16

Sealing systems

Most sizes and models of

FLOTTWEG CENTRIFUGES

are available in a variety of

rotor and housing seal designs

for the following operating

conditions:

• atmospheric

• vapor-tight

• gas-tight

FLOTTWEG CENTRIFUGES

can also be adapted for oper-

ating in closed-loop systems.

Atmospheric centrifuges are

the standard version. They are

used for applications where

there is no harm from products

or vapors released to the

environment and where it is

not necessary to isolate the

centrifuge bowl from the sur-

rounding atmosphere.

Vapor-tight versions of

FLOTTWEG centrifuges are

the right choice in cases where

substances emitted from the

process could pollute the

environment or if contact of

the product with ambient air is

undesirable. Additional seals

on rotor shafts and housing

provide the necessary seal.

Emissions can be eliminated

when purge gas/air is applied

to seals or the centrifuge hous-

ing is vented.

Atmospheric Vapor-tight Gas-tight

Gas-tight centrifuges allow

the safe operation with toxic,

corrosive or flammable media

by applying inert purge gas to

rotor seals and by inertizing

the process chamber and

centrifuge housing. Slight posi-

tive or negative pressures can

be maintained in the process

area by regulating the purge

gas supply. Special sealing

elements minimize the seal gas

consumption.

17

Purging with inert gas

Processing of hazardous

materials

Processes with any risk of

explosion must be controlled

by using inert gas. Generally,

nitrogen is used. Centrifuges

and system parts used for the

processing of hazardous mate-

rials have to be gastight to pre-

vent the exit of vapors into the

atmosphere as well as to avoid

the entry of air into the system.

Typical examples are process-

es in the chemical, petroleum,

and pharmaceutical industry,

processes with flammable

organic solvents or oil sludge

treatment processes. These

centrifuges comply with

ATEX 95 in Zone 1, up to

temperature class T3.

Purging

Before starting, the entire sys-

tem including the centrifuge is

purged. For this purpose, large

volumes of inert gas are flushed

through the system until the

oxygen is reduced below

critical level with the inert gas.

Purging is complete if a mul-

tiple of the system volume has

passed through the machine or

if an oxygen probe at the cen-

trifuge housing shows a safe

oxygen concentration.

Continuous inert gas supply

After successful purging and

during the operation with

product, sufficient inert gas is

fed into the system to ensure

a small overpressure. This

prevents atmospheric air from

penetrating into the system.

FLOTTWEG purge gas control unit

Control of centrifuges

purged with inert gas is

based on a differntial pressure

monitoring system with inte-

grated automatic control. Thus,

a fixed constant overpressure in

the sealing system using control

vales is maintained. Manual

readjustment is not required

anymore. This ensures a small

overpressure within the sealing

system and the inside of the

centrifuge guaranteeing protec-

tion against air leakage into the

system and product emission

into the atmosphere.

Processing of materials

susceptible to oxidation

Often the processing of bev-

erages and food requires

that products be prevented

from undergoing oxidation.

For this purpose the leakage

of air into the centrifuge is

prevented by corresponding

constructive measures and

positive inert gas pressures

are maintained at the centri-

fuge. In many cases, carbon

dioxide is used as the inert

gas. A system monitoring the

flow of gas is typically used.

Rotor

Seal

Housing

18

Lubrication

FLOTTWEG CENTRIFUGES

can be provided with different

lubrication systems. The lubri-

cation system depends on the

type of operation, for example,

batch or continuous operation

and the degree of automation

of the entire system.

pensed proportionally through

a special piston distributor. The

scroll bearings are permanently

sealed and lubricated, but can

also be re-greased manually.

Automatic grease lubrication

In contrast to the manual

central lubrication system,

the greasing system can

be automatically activated.

Automatic oil droplet

lubrication system

The fully automatic oil-air

lubrication system ensures

optimal lubrication with oil

droplets transported via air

to the bearings. Optimum

lubrication is achieved at

high speeds, with low oil

consumption and no loss in

performance. Monitoring of

This ensures the uniform and

reliable lubrication of the cen-

trifuge. It prevents bearings

from being under- or over-

lubricated and rules out short-

term spikes in bearing

temperatures and excessive

grease consumption. The

grease pump is automatically

controlled.

For many applications, an air-

operated oil droplet lubrication

system is supplied.

the oil and air pressure guaran-

tees high operational safety.

Pneumatic designs are avail-

able for utilization in

explosion-proof areas.

They are suited for Zone 1 up

to temperature class T4

according to ATEX 95. This

system does not require oil

recirculation or treatment.

Oil droplet lubrication systemAutomatic grease lubricationCentral lubrication system (manually operated)

Central lubrication system

All main lubrication points are

permanently manifolded via

tubing or hoses to a central

pump. The lubricant is dis-

19

Illustration of replaceable wear protection elements

Wear protection

FLOTTWEG offers a wide

range of wear protection to

meet the requirements of the

many different applications in

which centrifuges are installed:

[1] Welded hard facing or spray

coating

[2] Ceramic

[3] Tungsten carbide tiles,

brazed or bolted

[4] Chill castings

[5] Plastic liners

In order to minimize mainte-

nance costs for applications

involving highly abrasive

products, all wear protection

elements, except welded hard

facings or spray coatings, are

field-replaceable.

20

Decanter Control

Vibration monitoring

(standard)

Vibration sensors transmit

acceleration signals to an

analyzer that sounds an alarm

or trips the centrifuge upon

reaching the full limit value.

Speed Monitoring

(standard)

Bowl speed and scroll dif-

ferential speed are each

measured by an inductive

sensor and shown on a digital

display. Continuous monitor-

ing of key machine variables

during operation helps to

minimize preventable failures

and maintain acceptable safety

standards.

Temperature Monitoring

(optional)

Bearing temperatures are

constantly remote-monitored

in FLOTTWEG centrifuges

by means of resistance ther-

mometers. Upon exceeding

pre-set temperature limits,

the centrifuge alarms or shuts

down. This preventive measure

safeguards against bearing

failure or machine damage.

Bearing Monitoring (SPM)

(optional)

The roller bearings in the cen-

trifuge are monitored continu-

ously using an SPM system.

Shock-impulse sensors are

installed at each bearing and

connected to a central alarm.

Pressure waves (stock impulses)

emitted by damaged or worn

bearings are picked up by the

sensor and converted into an

electrical signal An alarm is

triggered if the signals from the

sensor exceed a set limit more

than once every 10 seconds.

21The FLOTTWEG mobile test units.Service on call 365 days a year.

Customer service

Customer service is our

strength

Application-based project plan-

ning, high-quality manufacturing

and professional after-sales

service are prerequisites for

customer satisfaction. Expe-

rienced and reliable service

engineers from our customer

service department are ready to

respond quickly to reduce down

time. The FLOTTWEG service

group is also available to per-

form preventive maintenance.

FLOTTWEG services include:

• Competent advice on

separation processes

• Pilot tests on-site or at the

FLOTTWEG laboratory and

test center

• Selection and specification

of equipment

• Customer-tailored automa-

tion/control systems and

process integration

• Design and construction of

complete process systems

• Installation, commissioning,

maintenance, repair and

spare parts service world-

wide.

FLOTTWEG products are

designed and manufactured

in GERMANY!

ISO certification

FLOTTWEG is ISO 9001

certified and manufactures its

products in compliance with all

current technical standards.

Service hotline

Telephone

+49 / 8741 301-321+49 / 180 5035135Telefax

+49 / 8741 301-404

22

Solid bowl centrifugesProduct lines and models

S6E

S4E

TRICANTER®

SORTICANTER®

SEDICANTER®

PRODECANTER®

Z23-3Z23-4

Z32-3

Z4E-3

Z4E-4

Z6E-3

Z6E-4

K4D-4

K6E-4

S3E

46303890

4470

Z32-4 3620

4140

4140

Z5E-4 3620

3550

3550

Z8E-4 3000

Z8E-4

2880

1680

K6EF-4 2160

10000

6500

5000

3550

2600

2600

46303890

4470

3620

4140

4140

3620

3550

3550

DECANTER

Z92-4

Z92-3

Z6E-2

3000

Z23-3Z23-4

Z32-3

Z4E-3

Z4E-4

Z6E-3

3000Z8E-3

Z6E-4

Z32-4

Z5E-4

3000C7E

3060C5E

3040C4E

3310C3E

Centrifugal force x g* Centrifugal force x g*

* dependent on temperature and density of the slurry

* dependent on temperature and density of the slurry

23

S6E

S4E

TRICANTER®

SORTICANTER®

SEDICANTER®

PRODECANTER®

Z23-3Z23-4

Z32-3

Z4E-3

Z4E-4

Z6E-3

Z6E-4

K4D-4

K6E-4

S3E

46303890

4470

Z32-4 3620

4140

4140

Z5E-4 3620

3550

3550

Z8E-4 3000

Z8E-4

2880

1680

K6EF-4 2160

10000

6500

5000

3550

2600

2600

46303890

4470

3620

4140

4140

3620

3550

3550

DECANTER

Z92-4

Z92-3

Z6E-2

3000

Z23-3Z23-4

Z32-3

Z4E-3

Z4E-4

Z6E-3

3000Z8E-3

Z6E-4

Z32-4

Z5E-4

3000C7E

3060C5E

3040C4E

3310C3E

Centrifugal force x g* Centrifugal force x g*

* dependent on temperature and density of the slurry

* dependent on temperature and density of the slurry

® = registered trademark in various countries

Repräsentant:

PR

– 0

004

I – 1

0 6

11

/ 1

0

FLOTTWEG subsidiaries around the world

AustraliaFlottweg AustralianRepresentative Office90 A Pacific HighwayRoseville, NSW 2069 SydneyAUSTRALIATelephone +61/2-94102255Telefax +61/2-94101466flottwegsydney@ozemail.com.au

ChinaFlottweg Separation Technology(Shanghai) Co. Ltd.No. 516, Chunzhong RoadXinzhuang Industrial ZoneShanghai 201108P. R. CHINATelephone +86/21-544 20775Telefax +86/21-544 21653flottweg@online.sh.cn

CIS/RussiaFlottweg AGTechno-Park “ORBITA”Kulakova st., 20, bld. 1B123592, Moscow CIS/RUSSIATelephone +7/495 9748 129Telefax +7/495 9748 129flottweg.moskau@flottweg.com

FranceFlottweg France SASTechnoparc-Espace Media3 rue Gustave Eiffel78306 Poissy CedexFRANCETelephone +33/1-3922-4044Telefax +33/1-3922-6453france@flottweg.fr

GermanyFlottweg AGVertriebs- und Service-CenterBüro Nord-OstHandelsplatz 204319 Leipzig-EngelsdorfGERMANYTelephone +49/341 86898-0Telefax +49/341 86898-40leipzig@flottweg.com

Flottweg AGVertriebs- und Service-CenterBüro Nord-WestRösrather Straße 26551107 KölnGERMANYTelephone +49/221 299917-20Telefax +49/221 299917-30koeln@flottweg.com

ItalyVeronesi Separatori SPAVia Don Minzoni, 140050 Villanova di CastenasoBolognaITALYTelephone +39/051 6054511Telefax +39/051 6053183info@veronesi.separatori.com

MexicoFlottweg Mexico S A. de C. V.Torre ZeroBenito Juàrez Nte. No. 1001 P. 6Col. San Francisco CoauxuscoMetepec, Estado de MèxicoC. P. 52158 MéxicoMEXIKOTelephone +52/722-232-5165Telefax +52/722-232-5165 Ext. 107pec@flottweg.com

PolandFlottweg Polskaul. Pelplinska 8b01-683 WarszawaPOLANDTelephone +48/22-732 2230Telefax +48/22-751 4791FlottwegPoland@flottweg.com

USA/CanadaFlottweg Separation Technology, Inc.10700 Toebben DriveIndependence, KY41051USATelephone +1/859 448-2300Telefax +1/859 448-2333sales@flottweg.net

For more than 50 FLOTTWEG representatives worldwide see our website:http://www.flottweg.com/ Flottweg worldwide